@Pluto
look into tanks
Have made a little sample mission including
[Vehicle.custom_chief68]
Car.Horch_108_Typ_1A_open
Tank.SdKfz_10_5
Car.Horch_108_Typ_1A_open
Car.Horch_108_Typ_1A_open
Car.Horch_108_Typ_1A_open
Car.Horch_108_Typ_1A_open
Car.Horch_108_Typ_1A_open
its a bit tricky you need a editor to copy the Tank.SdKfz_10_5 to the Vehicle..chief in FMB. In FMB you found only the not shooting transit Version under Vehicles so you must make this manually. But then you can save your collection for later use
Use external views to watch the aaa.